Bug#953911: debian-policy: clarify documentation of "Closes: #NNNNNN" changelog syntax

["Daniel Shahaf" <danielsh@apache.org>]

Daniel Shahaf wrote on Sat, 14 Mar 2020 18:14 +00:00:
> -   ::
> -
> -       /closes:\s*(?:bug)?\#?\s?\d+(?:,\s*(?:bug)?\#?\s?\d+)*/i
> -
> +   All of the bug numbers listed must be given on the same physical line
> +   as the word ``closes:``.

Is this newly-added sentence correct?

Whether it correctly states the semantics of the regexp depends on
whether the regexp is matched against the changelog entry as a single
multiline string or line-by-line.  In the former case, the list of bug
numbers would be allowed to span multiple lines, but in the latter case
it wouldn't.

Currently, the patch assumes all bug numbers should be on the same line,
but /usr/share/vim/vim81/syntax/debchangelog.vim allows bug numbers to
span multiple lines.  I'm guessing the syntax file is right and the patch should
be changed?

Cheers,

Daniel